How/Where to learn about mesh operations? (help)

Hello,

This has been a long running problematic area for me. In various spots in my coding I've wanted to "merge" meshes (at runtime). There's a whole bunch of scripts floating about that apparently do something like what I need, but I can't seem to grasp which one to use in which instance. I get into trial&error testing and just get more confused. So far, I haven't been able to disambiguate these for myself using Unity3D's script resources.

I'm wondering if anyone can give me pointers where I could learn some of this from the ground up? (Unity3D specific if possible) At a top level, I'd like to understand the difference between combining children vs MeshMerger, etc.

Thanks so much for any help.

pick up any introductory 3d computer graphics text book. or this great MIT course. it was my problem for a long time too.